MBR wastewater treating system with double circular grooves

Abstract

The invention relates to an MBR wastewater treating system with double circular grooves, comprising a water inlet pipe, a water outlet pipe and a water treating area provided with a membrane biological reactor (MBR), wherein the water treating area comprises an outer groove channel and an inner groove channel which are separated by a pool wall; the MBR membrane biological reactor is installed in the inner groove channel; an overflow weir is installed in the pool wall between the inner groove channel and the outer groove channel; the system is internally provided with a flow pushing machine, a reflux inlet and an aeration rotating disc; and a central island is installed in the center of the inner groove channel. The system combines the oxidizing groove with the membrane biological reactor, effectively improves the concentration of the sludge in the groove by controlling the reflux ratio and the waterpower stopping time, and simultaneously promotes to generate the concerted reaction of oxidation, nitration, de-nitration, and short de-nitration; the synergistic effect of air backswing and biochemical oxygen supply is used, thereby improving the use rate of the oxygen in the treating system, effectively reducing the energy consumption of the technique, decreasing the requirement of carbon nitrogen ratio and improving the de-nitrification efficiency.

Description

【Technical field】 [0001] The invention belongs to waste water treatment technology. More specifically, the present invention relates to a double-ring ditch waste water treatment system using MBR membrane bioreactors in cooperation. 【Background technique】 [0002] The eutrophication of water bodies is an increasingly serious and global water environment problem. The main reason is that water bodies rich in nutrients such as nitrogen and phosphorus are discharged into rivers or lakes, causing excessive growth of algae and other aquatic plants in the water. As a result, the concentration of dissolved oxygen in the water will drop sharply and cause a large number of aquatic animals such as fish to die, and eventually the water body will become foul-smelling black water, seriously damaging the ecological environment, and even harming human health and safety. In order to effectively curb the eutrophication of water bodies, the domestic sewage treatment standards have been gradual...

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Problems solved by technology

But at the same time, there are also defects such as poor phosphorus removal effect and the need to set up an independent secondary sedimentation with a large area. Among them, when the denitrification in the sedimentation tank is not complete, it will also cause denitrification in the secondary sedimentation tank, resulting in waste water. The medium sludge settling performance becomes worse, and the effluent becomes turbid, which needs to be improved

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